Electrical_Engineering_Circuit_Analysis_QA

In an electrical discharge machining process, the breakdown voltage across inter electrode gap (IEG) is 200 V and the capacitance of the RC circuit is 50 uF. The energy (in J) released per spark across the IEG is 1

Question 1 The graph below shows the electrical conductivity of some elements from the periodic table. Antimony Carbon Ruthenium Copper Silver 0. 20 40 60 80 Electrical conductivity (x10° S/m) 1.1. With the aid of a clearly labelled graph, describe the effect of temperature on the electrical conductivity of copper and antimony. сopper 1.2. Explain the difference in the electrical conductivity of ruthenium and antinomy. 1.3. Adding small quantities of boron may increase the electrical conductivity of antimony. With the aid of a labelled diagram, explain how this is possible. Besides lower electrical conductivity, suggest a reason why ruthenium is not used in electrical transmission wires. Give a detailed response. 1.4.

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Explain this schematic diagram.   Subject : Mechanical Engineering Electives

Question 3 We can make an energy dense capacitor by stacking layers of conductors separated with a dielectric, as shown below. Then, every other layer is connected together and held at the same voltage. V₁ V2 Suppose that all layers are identical and a single pair of plates has a capacitance of 21 F. What is the equivalent capacitance of this setup? Enter your answer in units of [Farads (F) ], rounded to the nearest one.

The rate of heat lost through insulation varies inversely as the thickness of the insulation. The rate of heat lost through a 3.5-inch thickness of insulation is 2200 Btu per hour. What is the rate of heat lost through a 5-inch thickness of the same insulation?

1) Calculate the magnitude of the force in the elbow joint in units of newtons.

Mechanical Engineering The fatigue strength limit Sn (n = 106) of a steel part is 112 MPa and its ultimate tensile strength (Sy) is 385MPa. Adopting Ct = 1, and S103 = 0.9 * Su* Ct, determine: (Use two decimal places in the answers), (* is multiplication signal): a) The fatigue strength (in MPa) corresponding to a life of 40000 cycles. b) The average life in cycles that this part would last if subjected to an alternating stress of 170 MPa due to bending.

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3- The voltage 2,000,000 V can be expressed in powers of 10 as: (a) 2 mV (b) 2 kV (c) 2 MV (d) 2 GV

Choose the wrong statement. Heat transfer by conduction depends on thickness of the material temperature difference of the material type of material cross-sectional area of the material none of the above

The switch in the circuit below has been open for a long time before it is closed at time t=0. We wish to find how the across the inductor and the current through the inductor change with time. Solve for the current through the inductor and use this to obtain the voltage across the inductor. Plot how the current and voltage vary with time. SW1 R2 30 Q +V1 10 V R1 L1 70 Q 1 pH

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Topic: Thermodynamics Show that the given fundamental equation has an exact differential.

THERMODYNAMICS TOPIC: FIRST LAW OF THERMO/THERMODYNAMIC SYSTEM   PLEASE ANSWER COMPLETELY THE QUESTION IN HANDWRITING AND SUPPORT YOUR SOLUTION WITH DIAGRAMS.   THANK YOU

THERMODYNAMICS TOPIC: FIRST LAW OF THERMO/THERMODYNAMIC SYSTEM   SOLVE COMPLETELY. AND PLEASE DRAW A DIAGRAM WITH YOUR SOLUTION.   THANK YOU

THERMODYNAMICS TOPIC: FIRST LAW OF THERMO/THERMODYNAMIC SYSTEM   PLEASE ANSWER COMPLETELY THE QUESTION IN HANDWRITING AND SUPPORT YOUR SOLUTION WITH DIAGRAMS.   THANK YOU

Which of the following is the unit for electrical conductivity? Select one: O (Q-m) -1 O (Q-mm) O m/S O Q-m In a stress strain curve of mild steel, the elastic limit will be before the limit of propor ype here to search 99+ hp fs 米 f5 f6 f7 1- f8 fg & 7 V 3 6. 8. 9/6 4+ %24 %23

account_circle   Science PhysicsQ&A LibraryA child’s toy consists of a m = 31 g monkey suspended from a spring of negligible mass and spring constant k. When the toy monkey is first hung on the spring and the system reaches equilibrium, the spring has stretched a distance of x = 17.6 cm, as shown in the diagram. This toy is so adorable you pull the monkey down an additional d = 7.6 cm from equilibrium and release it from rest, and smile with delight as it bounces playfully up and down.  1. Calculate the speed of the monkey, ve, in meters per second, as it passes through equilibrium.  2. Derive an expression for the total mechanical energy of the system as the monkey reaches the top of the motion, Etop, in terms of m, x, d, k, the maximum height above the bottom of the motion, hmax, and the variables available in the palette.   3. Calculate the maximum displacement, h, in centimeters, above the equilibrium position, that the monkey reaches. A child’s toy consists of a…

An electric hot water heater consumes 3.1 kilowatts of electricity and converts it to heat. How long will it take the water heater to heat a 67 gallon tank of water from 10 degrees Celsius to 50 degrees Celsius? (1 kilogram of water is 0.37 gallons, 1 Calorie = 4200 J).  It may be helpful to refer back to the weekly handout for guidance on this problem. Your final answer should be in minutes (rounded to the nearest 10 minutes).

The left side of this equation tells how much energy Q the cylinder gives to the water while it cools. The right side of this equation tells how much energy Q the water and aluminum cup absorb from the cylinder to warm up. Because it is the same energy, they are equal. What is known in this equation? Mcyl 411.7 g, malum 46.5 g, malum+water = 175 g Can you find: mwater =? g Twater = Talum = 20°C (water and cup of room temperature) 90°C, T; = 35°C (hot cylinder and cool "cylinder+cup+water" temperatures) Tcyl kCal Calum = 0.22, Cwater 1 (specific heat of water and aluminum, measured in units kg-°C What are we looking for is Ccul - How we find it? Plug all the numbers into the equation (1), Ccul will be one unknown which you can calculate from the equation. Important, convert all the masses from grams to kilograms! After you find Ccyl, compare it to known value for the copper 0.093(our cylinder is made out of copper). |Ceyl -0.093| % : · 100% 0.093

I need an answer in half an hour

2. The bars AB and BC of the structure are of length 4 m each. A load of 10 kN is placed at D and another 20 kN load is applied at E. The angle e = 70°. a) Determine the tension in cable DE. b) Find the reaction at B. c) Compute the reaction at A.

5 example of chemical hazard 5 example of physical hazard 5 example of erginimic hazard 5 example of biological hazards

Problem Solving. Solve the following problems. Show your solution using the GUESS method of problem solving.

PLEASE ANSWER IT ASAP FOR AN UPVOTE. >>>THERMODYNAMICS

What is the magnitude of the horizontal component of the reaction force at A, Rax and B, Rbx in Newtons What is the magnitude of the vertical component of the reaction force at A, R(ay) and B, R(by) in Newtons

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please solve the question in the photo

Differential equations

The amount of heat required to change the temperature of a material from T1 to T2 isgiven by Q= mCp(T2-T1). Using this equation, answer the following:a. How many BTU’s of heat are required to cook a beef roast weighing 10 lb from 40 to 130oF?, Cp = 0.8 BTU/lboFb. Convert the number of BTU’s of heat in watt hours.c. If this roast is heated in a microwave oven having an output of 200 watts, how long will it take to cook the roast?